Anatomy: Meet Your Penis
Given the amount of attention to this important body part, it is strange that there
is so much myth, mystery and misinformation about the penis. First off, there are
no bones or muscles in the penis. In fact, the penis is made up primarily of
spongy tissue, which becomes engorged with blood during erection. Two or three inches
of the penis are rooted inside the body in the pubococcygeus muscle (PC muscle) and it is
possible to strengthen this muscle for stronger erections, stronger orgasms and better
Because normal body temperature is too hot for sperm production, your testicles hang
down, away from the body. As you prepare to ejaculate, the testicles are pulled toward the
body. Sperm move through the vas deferens, a firm tube that extendes from your testicles
to the prostate gland, where they mix with secretions to form your ejaculate. The sperm
are actually only a small part of the ejaculate.
The prostate is a gland that lies at the center of your pelvis and is highly sensitive
to sexual stimulation. Some authors have even called it the male G-spot. During erotic
stumlation, the prostate becomes increasingly aroused. The closer you are to orgasm, the
more sensitive the prostate is. About 1/3 of your ejaculate comes from the prostate, so keeping
your prostate healthy is very important (though examinations can be unpleasant). The
prostate can be stimulated externally or through the anus.
The perenium is the area between the base of the testicles and the anus. This area can be
very sensitive to sexual stimulation, especially during orgasm.
Your Pubococcygeus (PC) Muscle
The PC muscle is actually a group of muscles that run from your pubic bone in front
to your tailbone in the back. You use the PC muscle every time you stop the flow of urine
from your bladder. It is also the muscle that contracts when you ejaculate, moving the semen
up through the penis and out of the body.
Due partly to it's proximity to the prostate gland and partly to its own high concentration
of sensitive nerve endings, the anus is a highly erogenous zone for many men (both gay and
straight). Extra care must be taken while sexually exploring this area, as it is rich